<template>
  <div class='home-category' @mouseleave="categoryId = null">
    <ul class="menu">
      <li :class="{ active: categoryId && categoryId === item.id }" v-for="item in menuList" :key="item.id"
        @mouseenter="categoryId = item.id">
        <RouterLink :to="`/category/${item.id}`">{{ item.name }}</RouterLink>
        <template v-if="item.children">
          <RouterLink v-for="sub in item.children" :key="sub.id" :to="`/category/sub/${sub.id}`">
            {{ sub.name }}
          </RouterLink>
        </template>
        <!-- 骨架 -->
        <template v-else>
          <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)"
            animated="light fade" />
          <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" animated="light fade" />
        </template>
      </li>
    </ul>
    <!-- 弹层 -->
    <div class="layer">
      <h4 v-if="categoryId">{{ categoryId=== 'brand' ? '品牌' : '分类'}}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <ul v-if="goodsList.length && categoryId != 'brand'">
        <li v-for="item in goodsList" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="name ellipsis-2">{{ item.name }}</p>
              <p class="desc ellipsis">{{ item.desc }}</p>
              <p class="price"><i>¥</i>{{ item.price }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <ul v-else-if="goodsList.length && categoryId == 'brand'">
        <li class="brand" v-for="item in goodsList" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="place"><i class="iconfont icon-dingwei"></i>{{ item.place }}</p>
              <p class="name ellipsis">{{ item.name }}</p>
              <p class="desc ellipsis-2">{{ item.desc }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<script lang="ts">
export default {
  name: "HomeCategory"
}
</script>
<script setup lang="ts">
import { useStore } from 'vuex'
import { computed, ref } from 'vue'
import { CategoryListItem } from '@/types/vuexTypes'
import { findBrand } from '@/api/home'
import XtxSkeleton from '@/components/library/xtx-skeleton.vue'
// 1. 获取vuex的一级分类，并且只需要两个二级分类
// 2. 需要在组件内部，定义一个品牌数据
// 3. 根据vuex的分类数据和组件中定义品牌数据，得到左侧分类完整数据(9分类+1品牌)数组
// 4. 进行渲染即可
interface menuListItem {
  id: string;
  name: string;
  children: CategoryListItem[];
  brands?: [];
  goods?: [];
}
const brand = {
  id: "brand",
  name: "品牌",
  children: [{ id: "brand-chilren", name: "品牌推荐" }],
  brands: []
};
const store = useStore();
const menuList = computed(() => {
  const list = store.state.category.list.map((item: CategoryListItem) => {
    return {
      id: item.id,
      name: item.name,
      // 防止初始化没有children的时候调用slice函数报错
      children: item.children && item.children.slice(0, 2),
      goods: item.goods
    };
  });
  list.push(brand);
  return list;
});
findBrand().then(({ result }) => {
  brand.brands = result;
});
// 当前鼠标菜单id
const categoryId = ref(null);
const goodsList = computed(() => {
  const currCategory = menuList.value.find((item: menuListItem) => item.id === categoryId.value);
  if (currCategory && currCategory.goods && currCategory.goods.length) {
    return currCategory.goods;
  }
  else if (currCategory && currCategory.brands && currCategory.brands.length) {
    return currCategory.brands;
  }
  else {
    return [];
  }
});
</script>

<style scoped lang='less'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;

  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;

      &:hover,
      &.active {
        background: @xtxColor;
      }

      a {
        margin-right: 4px;
        color: #fff;

        &:first-child {
          font-size: 16px;
        }
      }
    }
  }

  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;

    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;

      small {
        font-size: 16px;
        color: #666;
      }
    }

    ul {
      display: flex;
      flex-wrap: wrap;

      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;

        &:nth-child(3n) {
          margin-right: 0;
        }

        &.brand {
          height: 180px;

          a {
            align-items: flex-start;

            img {
              width: 120px;
              height: 160px;
            }

            .info {
              p {
                margin-top: 8px;
              }

              .place {
                color: #999;
              }
            }
          }
        }

        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;

          &:hover {
            background: #e3f9f4;
          }

          img {
            width: 95px;
            height: 95px;
          }

          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;

            .name {
              font-size: 16px;
              color: #666;
            }

            .desc {
              color: #999;
            }

            .price {
              font-size: 22px;
              color: @priceColor;

              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }
  }

  &:hover {
    .layer {
      display: block;
    }
  }
}
</style>